The other terminal is for the output. Pin 2 is where the accessory that the switch is going to turn on is connected.
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Spst switch wiring diagram. Dp switches control two independent circuits and act like two identical switches that are mechanically linked. Spst toggle switches function as simple on off switches. Spsts are perfect for on off switching. Sp switches control only one electrical circuit. Pin 1 is where the rocker switch receives the input power. Its got one output and one input.
Theyre also a very common form of momentary switches. Connect the live line or phase wire to the lower terminals of spst 1 way and spdt 2 way switches. Also relays can be used to switch higher draw accessories to reduce switch load and voltage drop. Pin 3 is where the switch is either connected to ground or left open. You might want to review the article on toggle switch wiring before proceeding. We will now go over the wiring diagram of a spst toggle switch.
Connect the lamp 1 to the upper terminal of spst switch. The switch will either be closed or completely disconnected. The diagram below represents the schematic diagram for a spst rocker switch. What do spst spdt dpst and dpdt mean. Pole refers to the number of circuits controlled by the switch. 1 terminal is for the input.
Below is the wiring schematic diagram for connecting a spst toggle switch. Connect the lamp 2 to the common middle terminal of spdt switch shown by blue wire in the circuit diagram. Do the proper earthing and grounding according to your local area codes. Sp and dp refer to single pole and double pole st and dt refer to single throw and double throw. An illuminated rocker switch is like a spst toggle switch with an extra terminal which allows the light to work. You can see that a spst toggle switch only has 2 terminals.
Spst toggle switch wiring. Spst switches should only require two terminals. A single pole single throw spst switch is as simple as it gets.
Gallery of Spst Switch Wiring Diagram
